Zarxrax/Sammie-Roto-2 ? reverse-engineered prompt

Build me a simple cross platform desktop app for AI assisted video masking and rotoscoping.

I want to load a video, pick objects or people in the frame, and quickly create clean masks with a live preview so I can refine the selection as I go. It should also support matting for getting a nicer cutout, and an object removal mode for erasing something from the video. Make the workflow easy enough that a normal person can follow it without reading a lot of instructions.

The app should feel polished, with a clear main window, easy export options, and helpful status messages while it works. If you need to, look up the current docs for the AI models online and make sure the app can run them in a practical way. Keep everything self contained so someone can install it and launch it locally without a complicated setup.